US3641591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft shell mushroom shaped heart
Assignee: University of Utah
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Filing: 1970-02-06
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Granted: 1972-02-15
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Expires: 1990-02-06
Abstract
Abstract The output volume of the artificial heart of this invention is highly responsive and directly proportional, within limits, to the atrial filling pressure of the blood flowing into the pumping chamber of the artificial heart. Flexible wall construction is responsible for the output volume being a function of the inlet pressure and also serves to reduce tissue damage to the surrounding body organs when the artificial heart is placed in the same general locality as that usually occupied by the natural heart. An integral valve means operable in conjunction with an inflatable blood displacement member occludes the inlet to the heart during the pumping phase of the heart.
Inventors
- 👤 Willem J Kolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:18
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/80; A61M60/855; A61M60/89; A61M60/898; A61M60/10; A61M60/122; A61M60/196; A61M60/40; A61M60/424; A61M60/427; A61M60/892; A61M60/894; A61M60/126; A61M60/148; A61M60/20; A61M60/247; A61M60/253; A61M60/268
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A blood pumping device to replace or temporarily assist the natural heart, said device comprising: a. a blood pumping chamber of flexible wall construction, and having separate blood inlet and outlet means; and b. an inflatable blood displacement member of elastic wall construction located within said pumping chamber and operable upon periodic inflation to forcibly eject blood from said pumping chamber through said outlet means, an inflatable valve head for periodically blocking said inlet means, said valve head being affixed to said displacement member and operable as a valving means, said valve head including means for operating said valve head separately from said inflation of said inflatable blood displacement member to thereby achieve optimum pumping efficiency of said blood pumping device.
Claim 2
Dependent Claim
121 words
A blood pumping device to replace or temporarily assist the natural heart, said device comprising: a. a blood pumping chamber of flexible wall construction, and having separate blood inlet and outlet means; and b. an inflatable blood displacement member of elastic wall construction located within said pumping chamber and operable upon periodic inflation to forcibly eject blood from said pumping chamber through said outlet means, an inflatable valve head for periodically blocking said inlet means, said valve head being affixed to said displacement member and operable as a valving means, said valve head including means for operating said valve head separately from said inflation of said inflatable blood displacement member to thereby achieve optimum pumping efficiency of said blood pumping device.
Claim 3
Dependent Claim
26 words
A blood pumping device as defined in claim 1 wherein the external configuration of the pumping device conforms substantially to that of a natural human heart.
Claim 4
Dependent Claim
32 words
A blood pumping device as defined in claim 1 wherein said flexible wall construction of the pumping chamber is restrained from expansion beyond predetermined limits by a nonelastic but flexible restraining surface.
Claim 5
Dependent Claim
57 words
A blood pumping device as defined in claim 3 wherein the elastic wall construction of the pumping member is operable to completely distend the elastic walls of the pumping chamber to the restraining limits of the restraining surface even in the presence of a differential amounts of blood in the blood pumping chamber at any given time.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |